Detecting ethernet gadget connections

Filip Onkelinx filip at linux4.be
Thu Mar 5 16:14:45 CET 2009


which kernel ?

you might want to check this one:
/sys/class/net/usb0/operstate

F.

On Thu, 05 Mar 2009 16:01:41 +0100, Daniel Benoy <daniel at benoy.name> wrote:

> I'm working on a script that will detect which network interfaces are  
> connected and mess with the routing accordingly, but I'm having trouble  
> detecting whether my USB ethernet gadget connection is up or down.
>
> ----
> ethtool when it's up:
> lisa:~# ethtool usb0
> Settings for usb0:
> 	Link detected: yes
>
> ethtool when it's down:
> lisa:~# ethtool usb0
> Settings for usb0:
> 	Link detected: yes
> ----
>
> Unlike on the host side, the usb0 interface doesn't appear and  
> disappear, allowing udev scripts to bring up/down the interface.
>
> Anyone know if there's a way to detect that a network connection has  
> actually been established?
>

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